Sharing--Wireless Charging Bluetooth Speaker Manufacturing Process and PCB Design Appreciation

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Sharing--Wireless Charging Bluetooth Speaker Manufacturing Process and PCB Design Appreciation [Copy link]

What I want to analyze for you is a Xiaomi wireless charger and Bluetooth speaker. This phone not only supports 50W wired fast charging, but also supports 30W wireless fast charging technology.

This wireless charging Bluetooth speaker can wirelessly charge your phone while listening to music, with a maximum power of 30W. Other products that support the Qi standard, such as mobile phones, TWS headphones, etc., can also be wirelessly charged.

The physical appearance and PCB design of the mainboard of this wireless Bluetooth speaker are also very beautiful, with a reasonable layout, relatively standardized wiring, and a very clever design. The entire product is very simple from the inside out without any redundancy or procrastination. I really appreciate this simple and ordinary design concept.

Let’s take a look at it below

1. Appearance of Xiaomi Wireless Charging Bluetooth Speaker

Continuing the simple design of Xiaomi products, the front of the Xiaomi packaging box is a rendering of the front of the speaker, where you can see the wireless charging area; the upper right corner is the Xiaomi brand logo, and the lower right corner is the product name "Xiaomi Wireless Charging Bluetooth Speaker", with four special features: 30W wireless fast charging, support for Qi standard, shocking sound quality, and charging while watching. The speaker supports Bluetooth 5.0.

There is only some product information on the back of the box: Xiaomi Wireless Charging Bluetooth Speaker, Product Model: XMWXCLYYX01ZM, Input Parameters 15V3A, Wireless Output 30W MAX, Product Dimensions 234×86.5×73.9mm. Client: Xiaomi Communication Technology Co., Ltd., Manufacturer: Jiangsu Zimi Electronic Technology Co., Ltd. (Xiaomi Ecological Chain Enterprise).

There are also five special features promoted on the top of the packaging box: shocking sound quality, support for Bluetooth 5.0, watch while charging, NFC fast connection, and Xiaoai screen-off.

What's in the box: speaker, power adapter and instruction manual.

The speaker comes with a white power adapter.

The plug of the power adapter is a DC round head.

Power adapter information, model: BLJ45W150300P-C, input: 100-240V~50/60Hz 1.1A, output: 15V3.0A, manufacturer: Zhongshan Baolijin Electronics Co., Ltd.

The front of the speaker is made of dark grey fabric. The circle and lightning logo in the middle are the wireless charging area. Below is a baffle for placing mobile phones or other wireless charging products. It looks very simple. In the back area, there is a strip-shaped heat dissipation area composed of many round holes, which is convenient for high-power wireless charging and heat dissipation. There is a light-colored Xiaomi logo on it and a DC charging port below.

Close-up of the top of the speaker, from left to right: the microphone opening, volume +/- adjustment button, power button, Bluetooth connection indicator light, and NFC pairing area.

Close-up of the front panel where the phone is placed, with a small LED indicator window. Close-up of the heat dissipation holes on the back of the speaker. The DC charging port on the back of the speaker.

There is a long non-slip rubber pad at the bottom of the speaker, with some product information printed on it. Xiaomi Wireless Charging Bluetooth Speaker, Product Model: XMWXCLYYX01ZM, Input: 15V3A, Wireless Output: 30W MAX, Manufacturer: Jiangsu Zimi Electronic Technology Co., Ltd. Bluetooth logo and indicator light next to it.

NFC pairing function area.

2. Focus on the internal process design of this Xiaomi wireless charging Bluetooth speaker

Pry open the front cover of the speaker, which is fixed by buckles. There is a long translucent rubber rod in the middle of the bottom, which transmits the light of the indicator light. The inside of the cover is a plastic plate, and the outer layer is made of fabric. There is a rubber pad on the fixing buckle to strengthen the fixation.

Close-up of the wireless charging coil. Speaker unit.

There is a thermistor in the middle of the wireless charging coil, which detects the temperature of the phone.

Remove the cover inside the sound cavity. There is shock-absorbing foam at the speaker opening to reduce resonance. Plastic buckles are used to make the place where the wires pass through airtight.

The wireless charging coil is glued to the internal metal bracket using thermal conductive glue.

There is a thick thermally conductive silicone pad on the inside of the metal bracket.

Finally saw the PCB board

The socket connecting the sound chamber to the main board. Take out the metal bracket and the main board is located at the bottom of the speaker.

Thickness comparison between the heat dissipation aluminum plate and a one-yuan coin.

The motherboard is secured to the plastic bracket at the bottom with screws.

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